/**
 * jQuery JSON Plugin
 * version: 2.3 (2011-09-17)
 *
 * This document is licensed as free software under the terms of the
 * MIT License: http://www.opensource.org/licenses/mit-license.php
 *
 * Brantley Harris wrote this plugin. It is based somewhat on the JSON.org
 * website's http://www.json.org/json2.js, which proclaims:
 * "NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.", a sentiment that
 * I uphold.
 *
 * It is also influenced heavily by MochiKit's serializeJSON, which is
 * copyrighted 2005 by Bob Ippolito.
 */

(function( $ ) {

    var	escapeable = /["\\\x00-\x1f\x7f-\x9f]/g,
    meta = {
        '\b': '\\b',
        '\t': '\\t',
        '\n': '\\n',
        '\f': '\\f',
        '\r': '\\r',
        '"' : '\\"',
        '\\': '\\\\'
    };

    /**
	 * jQuery.toJSON
	 * Converts the given argument into a JSON respresentation.
	 *
	 * @param o {Mixed} The json-serializble *thing* to be converted
	 *
	 * If an object has a toJSON prototype, that will be used to get the representation.
	 * Non-integer/string keys are skipped in the object, as are keys that point to a
	 * function.
	 *
	 */
    $.toJSON = typeof JSON === 'object' && JSON.stringify
    ? JSON.stringify
    : function( o ) {

        if ( o === null ) {
            return 'null';
        }

        var type = typeof o;

        if ( type === 'undefined' ) {
            return undefined;
        }
        if ( type === 'number' || type === 'boolean' ) {
            return '' + o;
        }
        if ( type === 'string') {
            return $.quoteString( o );
        }
        if ( type === 'object' ) {
            if ( typeof o.toJSON === 'function' ) {
                return $.toJSON( o.toJSON() );
            }
            if ( o.constructor === Date ) {
                var	month = o.getUTCMonth() + 1,
                day = o.getUTCDate(),
                year = o.getUTCFullYear(),
                hours = o.getUTCHours(),
                minutes = o.getUTCMinutes(),
                seconds = o.getUTCSeconds(),
                milli = o.getUTCMilliseconds();

                if ( month < 10 ) {
                    month = '0' + month;
                }
                if ( day < 10 ) {
                    day = '0' + day;
                }
                if ( hours < 10 ) {
                    hours = '0' + hours;
                }
                if ( minutes < 10 ) {
                    minutes = '0' + minutes;
                }
                if ( seconds < 10 ) {
                    seconds = '0' + seconds;
                }
                if ( milli < 100 ) {
                    milli = '0' + milli;
                }
                if ( milli < 10 ) {
                    milli = '0' + milli;
                }
                return '"' + year + '-' + month + '-' + day + 'T' +
                hours + ':' + minutes + ':' + seconds +
                '.' + milli + 'Z"';
            }
            if ( o.constructor === Array ) {
                var ret = [];
                for ( var i = 0; i < o.length; i++ ) {
                    ret.push( $.toJSON( o[i] ) || 'null' );
                }
                return '[' + ret.join(',') + ']';
            }
            var	name,
            val,
            pairs = [];
            for ( var k in o ) {
                type = typeof k;
                if ( type === 'number' ) {
                    name = '"' + k + '"';
                } else if (type === 'string') {
                    name = $.quoteString(k);
                } else {
                    // Keys must be numerical or string. Skip others
                    continue;
                }
                type = typeof o[k];

                if ( type === 'function' || type === 'undefined' ) {
                    // Invalid values like these return undefined
                    // from toJSON, however those object members
                    // shouldn't be included in the JSON string at all.
                    continue;
                }
                val = $.toJSON( o[k] );
                pairs.push( name + ':' + val );
            }
            return '{' + pairs.join( ',' ) + '}';
        }
    };

    /**
	 * jQuery.evalJSON
	 * Evaluates a given piece of json source.
	 *
	 * @param src {String}
	 */
    $.evalJSON = typeof JSON === 'object' && JSON.parse
    ? JSON.parse
    : function( src ) {
        return eval('(' + src + ')');
    };

    /**
	 * jQuery.secureEvalJSON
	 * Evals JSON in a way that is *more* secure.
	 *
	 * @param src {String}
	 */
    $.secureEvalJSON = typeof JSON === 'object' && JSON.parse
    ? JSON.parse
    : function( src ) {

        var filtered =
        src
        .replace( /\\["\\\/bfnrtu]/g, '@' )
        .replace( /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
        .replace( /(?:^|:|,)(?:\s*\[)+/g, '');

        if ( /^[\],:{}\s]*$/.test( filtered ) ) {
            return eval( '(' + src + ')' );
        } else {
            throw new SyntaxError( 'Error parsing JSON, source is not valid.' );
        }
    };

    /**
	 * jQuery.quoteString
	 * Returns a string-repr of a string, escaping quotes intelligently.
	 * Mostly a support function for toJSON.
	 * Examples:
	 * >>> jQuery.quoteString('apple')
	 * "apple"
	 *
	 * >>> jQuery.quoteString('"Where are we going?", she asked.')
	 * "\"Where are we going?\", she asked."
	 */
    $.quoteString = function( string ) {
        if ( string.match( escapeable ) ) {
            return '"' + string.replace( escapeable, function( a ) {
                var c = meta[a];
                if ( typeof c === 'string' ) {
                    return c;
                }
                c = a.charCodeAt();
                return '\\u00' + Math.floor(c / 16).toString(16) + (c % 16).toString(16);
            }) + '"';
        }
        return '"' + string + '"';
    };

})( jQuery );
